I'm building an uber-number crunching box for a guy.  He wants the best in
everything, so naturaly I recomended an Athlon MP machine.  he had a few
choice words to say about the dual MPs, and wanted a single Athlon
instead.  He wouldn't tell me WHY, other than "I've heard things".

Is Athlon MP a good choice?  Are there weird issues under various
OS's?  (this box will be running dual Win2K/Linux).

-Brian